mmdevapi: Implement IAudioClient3_GetSharedModeEnginePeriod.

dlls/mmdevapi/client.c

@@ -929,10 +929,17 @@ static HRESULT WINAPI client_GetSharedModeEnginePeriod(IAudioClient3 *iface,
                                                 UINT32 *max_period_frames)
 {
     struct audio_client *This = impl_from_IAudioClient3(iface);
-    FIXME("(%p)->(%p, %p, %p, %p, %p) - stub\n", This, format, default_period_frames,
-                                                 unit_period_frames, min_period_frames,
-                                                 max_period_frames);
-    return E_NOTIMPL;
+    FIXME("(%p)->(%p, %p, %p, %p, %p) - partial stub\n",
+          This, format, default_period_frames,
+          unit_period_frames, min_period_frames,
+          max_period_frames);
+
+    *default_period_frames =
+        *min_period_frames =
+        *max_period_frames =
+        format->nSamplesPerSec / 100; /* ~10ms */
+    *unit_period_frames = 1;
+    return S_OK;
 }
 
 static HRESULT WINAPI client_GetCurrentSharedModeEnginePeriod(IAudioClient3 *iface,

dlls/mmdevapi/tests/render.c

@@ -346,7 +346,6 @@ static void test_audioclient(void)
 
         hr = IAudioClient3_GetSharedModeEnginePeriod(
             ac3, pwfx, &default_period, &unit_period, &min_period, &max_period);
-        todo_wine
         ok(hr == S_OK, "GetSharedModeEnginePeriod returns %08lx\n", hr);
 
         hr = IAudioClient3_InitializeSharedAudioStream(